Mercerizing



Patented Dec. 22, 1936 UNITED STATES PATENT OFFICE MERCERIZING Karl Brodersen, Dessair in Anhait, Germany, assignor to I. G. Farbenindustrie Aktiengesellschaft, Frankfort-on-the-Main, Germany No Drawing. Application June so, 1934, Serial No. 733,337. In Germany June 30, 1933 2 Claims. (Cl. 8-20) The shrinkage observed after 10, 20, and 30 secends, is indicated in percentage of the original length of the threads.

For comparison, the action of a number of other phenolic compounds suggested for the purpose in question, likewise,

is indicated in this table.

xylenols, chlorphenol, chlorcresol or polyhalogen cresol with or without addition of, for instance,

saturated or unsaturated polyhydric alcohols of 25 wherein Hlg means halogen, impart to mercerizing lyes an outstanding good wetting capacity. Contrary to other'monohalogenated phenol derivatives they may be used without addition of a solvent or of another assistant, they surpass 30 even the polyhalogenated cresols with respect to their wetting capacity. It is not necessary to add these halogenated xylenols to the mercerizing lyes in a pure state, but one may use the halogenated technical mixtures of the xylenols 5 in question.

' In the table following hereafter; the wetting capacity of some of my new assistants for mercerizing cotton may be seen. The wetting capa city of the different products is indicated in this ,40 table by the shrinkageof a crude cotton yarn that is immersed into a mercerizing lye of 30 IE6. at about 20 C. for 5 seconds with a tension corresponding to 10 grams per four threads.

.ihrinkege of the crude Grs. cotton thread indicated Substance added to the lye addgd 1 ter 10 sec. 20 sec. 30 sec.

(1 Without addition, 0. 2 l. 5 2. 5 (2 P on 0.3 1.6 3.0 (3 Para-chlorphenol 1.0 3. 8 6. 7 (4 Para-chlorphenol 0.3 l. 6 3. 5 (5) Monochloreresol prepared from crude cres 2. 5 7. 5 ll. 6 (6) Monochlorcresol prepared from crude cresol 0. 3 1. 7 3. 4 (7) Crude dichlorcresol repared from crude or en 1. 5. 0 10. 8; Purified .hlorxy-nnnl 8.0 15. 9 17.8

9 Monochiorxyleno prepared 11:05 te gl gca crude xy one o X oiling 8t 209to 225 0 7. 5 16. 0 17.5

handling, dosing and packing.

What I claim is:

1. A process for treating cellulosic fibers with alkali, consisting in submitting them to the action of a bath consisting of a mercerizing lye and a monochlorxylenol.

2. Mercerizing bath consisting of a caustic soda solution and monochlorxylenol.

KARL BRODERSEN. 

